<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="text" id="message">
    <button id="submit">提交</button>
    <script>
        let websocket = new WebSocket("ws://127.0.0.1:8080/test")

        websocket.onopen = function(){
            console.log("建立连接");
        }

        websocket.onmessage = function(e){
            console.log("收到消息: "+e.data);
        }

        websocket.onerror = function(){
            console.log("连接异常");
        }

        websocket.onclose = function(){
            console.log("连接异常");
        }

        // 点击按钮后，通过websocket 发送请求
        let input = document.querySelector("#message");
        let button = document.querySelector("#submit");
        button.onclick = function(){
            console.log("发送消息： "+input.value);
            websocket.send(input.value);
        }
    </script>
</body>
</html>